The switching from one element to the other element in a typical mobile satellite array.
A. Series
B. Radial
C. Matrix
D. Shunt

1 Answer

Answer :

D. Shunt

Related questions

Description : What circuit is responsible in activating and deactivating adjacent antenna elements in a mobile satellite array? A. Radial divider B. Divider/combiner C. Radial combiner D. Radial multiplexer

Last Answer : A. Radial divider

Description : In a typical mobile satellite array antenna if three elements are activated, how many elements are deactivated? A. 3 B. 11 C. 5 D. 9

Last Answer : B. 11

Description : Most mobile satellite array uses ___________ in transforming 50 to 150 Ω impedance. A. stub B. balun C. quarter-wavelength transformer D. microstrip tapers.

Last Answer : C. quarter-wavelength transformer

Description : A mobile satellite array has usually how many elements? A. 6 B. 88 C. 12 D. 14

Last Answer : D. 14

Description : In satellite communications, what means of attitude control is using the angular momentum of the spinning body to provide the roll and yaw stabilization? A. Spin stabilization B. Radial stabilization C. Three-axis stabilization D. Station keeping

Last Answer : A. Spin stabilization

Description : Receives and collects satellite signals form a broadcast satellite. A. LNB B. Yagi-Uda array C. Satellite receiver D. Satellite disk

Last Answer : D. Satellite disk

Description : What is the typical bandwidth of a satellite band? A. 36 MHz B. 40 MHz C. 70 MHz D. 500 MHz

Last Answer : D. 500 MHz

Description : What is the typical satellite transponder bandwidth? A. 24 MHz B. 500 MHz C. 36 MHz D. 48 MHz

Last Answer : C. 36 MHz

Description : Which does not use vertical polarization antenna? A. AM Broadcasting B. FM Broadcasting C. Mobile Communications D. Satellite Communications

Last Answer : B. FM Broadcasting

Description : Station located on an object which is beyond and is intended to go beyond the major portion of the earth’s atmosphere. A. Terrestrial station B. Space station C. Satellite station D. Mobile satellite station

Last Answer : B. Space station

Description : Radio communication operation service between mobile and land stations or between mobile stations. A. Land mobile satellite service B. Maritime mobile service C. Mobile service D. Land mobile

Last Answer : C. Mobile service

Description : What is the proper procedure for suppressing electrical noise in a mobile station? A. Apply shielding and filtering where necessary B. Insulate a all plain sheet metal surfaces from each other C. ... -static spray liberally to all nonmetallic D. Install filter capacitors in series with all dc wiring

Last Answer : A. Apply shielding and filtering where necessary

Description : A test method of comparing two audio systems by switching inputs so that the same recording is heard in rapid succession over one given system and then the other. A. B test B. A test C. AB test D. C test

Last Answer : C. AB test

Description : The rotation of a three-phase induction motor can be reversed by _____________. A. interchanging any two of the three line leads to the stator B. disconnecting one of the three line leads to the ... the shunt field coil leads D. permanently disconnecting any two of the three line leads to the stator

Last Answer : Answer: A

Description : An entity, relying on the transmission, switching and local distribution facilities of local exchange and inter-exchange operators, and overseas carriers, offers enhanced services beyond those ordinarily ... B. Value-added service provided C. Inter-exchange carrier D. Local exchange carrier

Last Answer : B. Value-added service provided

Description : Transmission system for a multidrop network A. Taken passing B. Polling C. Switching D. CSMA/CD

Last Answer : B. Polling

Description : Data switching systems. A. improve the efficiency of data transfer B. are limited to small data networks C. required additional lines D. are not used in data system

Last Answer : A. improve the efficiency of data transfer

Description : What is the advantage of monolithic switching regulators?

Last Answer : *Greater efficiency is achieved as the power transistor is made to operate as low impedance switch.Power transmitted across the transistor is in discrete pulses rather than as a steady current flow. * ... frequency can be increased so as to reduce the size and weight of the inductors and capacitors

Description : What is a switching regulator?

Last Answer : Switching regulators are those which operate the power transistor as a high frequency on/off switch, so that the power transistor does not conduct current continously.This gives improved efficiency over series regulators. 

Description : The antenna efficiency of an HF grounded vertical antenna can be made comparable to that of a half-wave antenna A. By installing a good ground radial system B. By isolating the coax shield from ground C. By shortening the vertical D. By lengthening the vertical

Last Answer : A. By installing a good ground radial system

Description : How can the antenna efficiency of an HF grounded vertical antenna be made comparable to that of a half-wave antenna? A. By lengthening the vertical B. By installing a good ground radial system C. By shortening the vertical D. By isolating the coax shield from ground

Last Answer : B. By installing a good ground radial system

Description : An ungrounded antenna near the ground A. acts as a single antenna of twice the height B. is unlikely to need an earth mat C. acts as antenna array D. must be horizontally polarized

Last Answer : C. acts as antenna array

Description : Good grounding is important for A. horizontal antennas B. broadside array antennas C. vertical antennas D. Yagi-Uda antennas

Last Answer : C. vertical antennas

Description : A theoretical reference antenna that provides a comparison for antenna measurements. A. Marconi antenna B. Isotropic radiator C. Yagi-Uda array D. Whip antenna

Last Answer : B. Isotropic radiator

Description : ______ is an antenna array which is highly directional at right angles to the plane of the array? A. Broadside array B. End-fire array C. Turnstile array D. Log-periodic array

Last Answer : A. Broadside array

Description : In order to get maximum radiation to all surrounding points in the horizontal plane, the antenna used is a A. vertical loop B. vertical quarter-wavelength rod C. array which includes parasitic elements D. a horizontal Hertz dipole

Last Answer : B. vertical quarter-wavelength rod

Description : _____ is an antenna with a number of half-wave antenna on it. A. Antenna array B. Tower C. Omni-directional D. Rhombic

Last Answer : A. Antenna array

Description : All elements in a beam _____ antennas are in line A. collinear B. yagi C. broadside array D. log-periodic

Last Answer : A. collinear

Description : Which is a non-resonant antenna? A. Rhombic antenna B. Folded dipole C. End-fire array D. Yagi-Uda antenna

Last Answer : A. Rhombic antenna

Description : If the current ratios of the two or more elements must be held 5% and the phase angle to 3° the antenna is called a A. end fire array B. critical phased array C. broadband array D. wideband array

Last Answer : B. critical phased array

Description : The reflector and director of an antenna array are considered as A. Parasitic elements B. Transcendental elements C. Feed-points D. Driven elements

Last Answer : A. Parasitic elements

Description : Which is the non-resonant antenna? A. Broadside Antenna B. Folded Dipole C. Rhombic antenna D. End fire array

Last Answer : C. Rhombic antenna

Description : A type of array antenna which consists of one half-wave driven dipole, one reflector and one director A. Hertzian dipole B. Yagi-uda C. Broadside collinear D. Log periodic dipole array

Last Answer : B. Yagi-uda

Description : It consists of a number of dipoles of equal size, equally spaced along a straight line with all dipoles fed in the same phase from the same source. A. Log-periodic antenna B. Yagi antenna C. End-fire array D. Broadside array

Last Answer : D. Broadside array

Description : Known as the technique for adding a series inductor at or near the center of an antenna element in order to cancel the capacitive reactance of an antenna. A. Dipole B. Center loading C. Reflector D. loading coil

Last Answer : D. loading coil

Description : A shunt-fed quarter-wavelength Marconi antenna A. has maximum RF impedance to ground at its feedpoint B. has a current null at its feedpoint C. has a zero DC resistance to ground D. has zero RF resistance to ground

Last Answer : C. has a zero DC resistance to ground

Description : A one-quarter wavelength shunt-fed vertical Marconi antenna A. has maximum radiation in a vertical direction B. must have a horizontal receiving antenna for the best reception C. must use a receiving antenna for the best reception D. must have a vertical receiving antenna for the best reception

Last Answer : D. must have a vertical receiving antenna for the best reception

Description : Python: create an empty Numpy array/matrix -Web-Development

Last Answer : answer:

Description : What are the advantages and disadvantages of sparse matrix using array?

Last Answer : Feel Free to Answer

Description : The typical three-layer switching topology will not create latency within a cloud network. A. True B. False

Last Answer : False

Description : The typical three-layer switching topology will not create latency within a cloud network. A. True B. False

Last Answer : False

Description : Show how finite state machine model helps in designing a switching system and give a typical example.

Last Answer : Switching system basically belongs to the class of finite state machines (FSM) which are asynchronous in nature and follows a sequential logic for their operation. They can be modeled by ... circuits and memory elements. Clocked synchronous operation shown in Fig. overcome such problems.  

Description : Satellite-Switched Time-Division Multiple Access (SS/TDMA) is A. the method of determining whichdevice has access tothe transmission medium at any time. B. a medium access control technique for ... switching is used to dynamically changethechannel assignments D. All of theabove E. None of the above

Last Answer : a form of TDMA in which circuit switching is used to dynamically changethechannel assignments

Description : Which of the following is not a typical output from a GPS receiver? A. Latitude B. Speed C. Altitude D. Longitude

Last Answer : B. Speed

Description : What is the typical separation between the two conductors in a parallel wire line? A. 0.001 to 0.01 m B. 200 to 500 mm C. 0.635 to 15.24 cm D. 2.5 to 5 in.

Last Answer : C. 0.635 to 15.24 cm

Description : The typical length of the rhombic antenna is ____. A. 2λ to 8λ B. 10λ to 20λ C. 1λ to 3λ D. 5λ to 10λ

Last Answer : A. 2λ to 8λ

Description : What is the typical loudness level of a watch ticking? A. 0 phon B. 40 phons C. 20 phons D. 60 phons

Last Answer : C. 20 phons

Description : What is the typical gain of a rhombic antenna? A. Between 15 to 60 B. Between 20 to 90 C. Between 50 to 75 D. Between 10 to 25

Last Answer : A. Between 15 to 60

Description : What is the typical frequency used for communicating to submerged submarines? A. 100 Hz B. 500 Hz C. 4 kHz D. 200 Hz

Last Answer : A. 100 Hz

Description : What is typical loudness level of an acoustic guitar 1 foot away? A. 60dB B. 100dB C. 80dB D. 40dB

Last Answer : C. 80dB